Goldstone Radar Observations Planning: Asteroid 3200 Phaethon
3200 Phaethon 3200 Phaethon (1983 TB) was discovered on 1983 Oct. 11 by NASA's Infrared Astronomical Satellite (IRAS). With a diameter of about 5 km, Phaethon is the third largest near-Earth asteroid classified as "Potentially Hazardous" after 53319 1999 JM8 (~7 km) and 4183 Cuno (~5.6 km). Phaethon has an unusually high eccentricity of 0.890 and a perihelion of 0.140 au that is among the smallest known in the near-Earth asteroid population. Due to the close perihelion, Phaethon is named for the Greek mythological son of Helios (the Sun god). In Greek mythology, Phaethon drove his father's chariot for one day, lost control of its horses, and nearly set the Earth on fire. Phaethon will approach within 0.069 au of Earth on 2017 December 16 when it will be a strong radar imaging target at Goldstone and Arecibo. This will be the best opportunity to date for radar observations of this asteroid and we hope to obtain detailed images with resolutions as fine as 75 m/pixel at Goldstone and 15 m/pixel at Arecibo. The images should be excellent for obtaining a detailed 3D model. Extensive photometric observations by many observers have yielded a rotation period of 3.6 h, a lightcurve amplitude of up to ~0.4 mag, and a pole direction of (lambda, beta) = (85+- 13, -20+-10) deg (Ansdell et al. 2014). Ansdell et al. also obtained axis ratios of x/y = 1.04 and x/z = 1.14, so Phaethon appears relatively unelongated along its equator but somewhat flattened at its poles. Spectroscopic observations by several observing teams strongly suggest that Phaethon is an optically-dark B-class object. However, thermal infrared observations dating back to the 1990s by Harris et al. give an optical albedo of 0.11 that seems somewhat bright for the B class. More recent observations by NASA's NEOWISE mission have detected Phaethon and could provide an update on the diameter and albedo. Phaethon was detected by radar at Arecibo in December 2007. Due to equipment problems, the 2007 data consist of a modest number of echo power spectra and a handful of delay-Doppler images from two days. Echo power spectra obtained at Arecibo in 2007 were strong and provided a maximum bandwidth of 44 Hz. Combined with the rotation period of 3.6 h, the bandwidth places a lower bound on the maximum pole-on dimension of about 5.7 km. The 2007 delay-Doppler images show a rounded object, which is consistent with the shape of the echo power spectra, but were relatively weak and do not show detailed surface features. The 2007 Arecibo observations have a radar cross section of about 2.4 km^2, that, if we adopt a diameter of 5.1 km, imply a radar albedo of 0.12. As such, the SNRs in the tables below could be too low by about 20%. Phaethon is widely thought to be the parent body for the Geminids meteor stream due to similarities between its orbit and that of the meteors (Whipple 1983; Williams and Wu 1993). Most meteor streams are associated with comets, so this raises the question of whether Phaethon could be an inactive comet nucleus. Observations by Jewitt and colleagues have revealed episodic activity by Phaethon, but have not, to date, shown the signature of particles as large as those in the Geminids meteors. The implication is that Phaethon experiences occasional outbursts that produce particles far larger than any seen so far. As such, Phaethon is an unusual object that appears asteroidal most of the time but occasionally shows low levels of activity when it is near perihleion. Phaethon is classified as an asteroid, not as a comet, and despite the high eccentricity, the object's Tisserand parameter is not cometary. The 2017 apparition is the closest to Earth since the asteroid's discovery so it may be possible for optical observers to detect new activity. If Phaethon shows unexpectedly strong activity in 2017, then there is a small (perhaps very small) chance that CW radar observations might reveal echoes from a cloud of small particles similar to the "skirts" seen in radar observations of active comet nuclei. The very low perihelion of Phaethon makes it a possible candidate for detecting general relativistic and/or solar oblateness effects in its orbital motion (Margot and Giorgini 2010), so one of our principal objectives is to obtain high-resolution radar ranging measurements to support this effort. Phaethon will be brighter than 16th magnitude for about one month from November-December 2017. Phaethon is predicted to reach 11th magnitude in mid-December when it will be visible in small telescopes for experienced observers at sites with dark skies. Phaethon is potentially detectable at Goldstone for about three weeks and tracks are scheduled on ten days between Dec. 11-21. Due to its relatively rapid motion in declination, Phaethon is visible at Arecibo on only five days from Dec. 15-19 and observations are scheduled on all of those dates. We may also request time at Green Bank to receive Goldstone transmissions. The 2017 encounter is the closest by this asteroid since 1974 and until 2093. Phaethon is classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics
Name Phaethon
Number 3200
Discoverer IRAS
Discovery date 1983 Oct 11
orbit type Apollo
Close approach date 2017 Dec 16
Close approach dist. 0.0689 au
Close approach dist. 26.8 lunar distances
semimajor axis 1.271 au
eccentricity 0.890
inclination 22.2 deg
orbital period 1.433 y
perihelion distance 0.140 au
aphelion distance 2.402 au
MOID 0.0206 au
Tisserand parameter 4.510 (asteroidal)
absolute magnitude (H) 14.6
diameter 5.1 km
optical albedo 0.11
spectral class F, B
rotation period 3.603 h
lightcurve amplitude 0.11 - 0.44 mag
pole direction lambda = 85 deg, beta = -20 deg
PHA
Phaethon Close Earth Approaches Within 0.15 au:
Date (TDB) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p
A.D. 1631 Dec 04.87057 Earth .129451 .129448 .129455 37.463 0.28 8.94E5 .000000
A.D. 1723 Dec 05.57449 Earth .145430 .145389 .145471 38.105 2.71 6.83E5 .000000
A.D. 1746 Dec 06.19456 Earth .128707 .128685 .128730 37.584 1.48 6.47E5 .000000
A.D. 1769 Dec 05.41186 Earth .142850 .142847 .142853 38.059 0.18 6.18E5 .000000
A.D. 1802 Dec 07.50563 Earth .128020 .127994 .128046 37.576 1.69 5.65E5 .000000
A.D. 1812 Dec 14.41557 Earth .075414 .075392 .075436 31.957 1.32 5.41E5 .000000
A.D. 1845 Dec 08.17934 Earth .111777 .111762 .111792 37.074 0.95 5.05E5 .000000
A.D. 1855 Dec 15.93005 Earth .086277 .086264 .086289 31.544 0.70 4.93E5 .000000
A.D. 1888 Dec 09.19404 Earth .088686 .088677 .088694 36.336 0.56 4.43E5 .000000
A.D. 1898 Dec 16.74220 Earth .107786 .107778 .107794 30.863 0.40 4.47E5 .000000
A.D. 1931 Dec 13.50144 Earth .038389 .038386 .038392 34.597 0.21 3.88E5 .000000
A.D. 1964 Dec 08.70985 Earth .131281 .131280 .131283 37.774 0.09 4.10E5 .000000
A.D. 1974 Dec 16.36240 Earth .054746 .054745 .054747 32.365 0.07 3.49E5 .000000
A.D. 2007 Dec 10.19673 Earth .120896 .120896 .120896 37.446 0.02 4.10E6 .000000
A.D. 2017 Dec 16.95810 Earth .068932 .068932 .068932 31.888 0.03 5.45E5 .000000
A.D. 2050 Dec 11.82259 Earth .082569 .082568 .082571 36.236 0.09 2.86E5 .000000
A.D. 2060 Dec 18.48085 Earth .111131 .111129 .111133 30.648 0.08 2.72E5 .000000
A.D. 2093 Dec 14.45306 Earth .019812 .019810 .019813 34.234 0.14 1.69E5 .000000 Wow...
A.D. 2136 Dec 13.92650 Earth .055065 .055062 .055068 35.401 0.20 6.11E5 .000000
A.D. 2146 Dec 19.83488 Earth .090252 .090248 .090255 31.170 0.16 98428. .000000
A.D. 2189 Dec 15.24219 Earth .035481 .035478 .035485 34.795 0.21 74794. .000000
A.D. 2199 Dec 20.58935 Earth .094898 .094896 .094899 31.016 0.06 2.44E5 .000000
A.D. 2242 Dec 14.61151 Earth .091625 .091613 .091636 36.502 0.68 62050. .000000
A.D. 2252 Dec 19.01935 Earth .033027 .033013 .033041 32.755 0.72 51202. .000000
A.D. 2295 Dec 15.68761 Earth .079921 .079893 .079949 36.095 1.62 1.19E5 .000000
A.D. 2305 Dec 22.37725 Earth .084068 .084034 .084103 31.292 1.67 1.56E5 .000000
A.D. 2348 Dec 18.51981 Earth .026363 .026291 .026435 34.388 4.49 2.31E5 .000000
A.D. 2358 Dec 23.35001 Earth .096338 .096314 .096363 30.968 1.17 2.57E5 .000000
A.D. 2401 Dec 15.20440 Earth .122133 .121893 .122374 37.327 14.55 3.24E5 .000000
A.D. 2411 Dec 20.98099 Earth .021385 .021209 .021565 33.333 18.19 3.47E5 .000000
A.D. 2454 Dec 15.03196 Earth .141051 .138488 .143615 37.905 157.41 4.26E5 .000000
A.D. 2464 Dec 20.49665 Earth .025300 .024373 .026604 33.392 174.52 4.52E5 .000000
Phaethon also makes repeated close encounters with Venus, Mercury, and 15 Eunomia.
Last update: 2017 Dec 19
Articles about Phaethon are appearing online on major news outlets, science and astronomy websites,
and in some of the British and American tabloids. Here are some links:
Sky and Telescope
http://www.skyandtelescope.com/observing/3200-phaethon/
Astronomy Now
https://astronomynow.com/2017/12/04/see-asteroid-phaethon-source-of-the-geminids-in-a-close-brush-with-earth/
EarthSky.org
http://earthsky.org/astronomy-essentials/rock-comet-3200-phaethon-geminid-meteor-shower
http://earthsky.org/astronomy-essentials/3200-phaethon-rock-comet-how-to-see
Space.com
https://www.space.com/39047-asteroid-3200-phaethon-close-brush-with-earth.html
Time
http://time.com/5039623/3-mile-wide-asteroid-3200-phaethon/
Newsweek
http://www.newsweek.com/3200-phaethon-geminid-meteor-shower-nasa-722056
CBS News
https://www.cbsnews.com/news/asteroid-expected-closest-pass-earth-40-years/
AsteroidDay.org
https://asteroidday.org/11-25-2017-asteroid-3200-phaethon/
Smithsonian
https://www.smithsonianmag.com/smart-news/asteroid-expected-pass-near-earth-december-180967351/
National Public Radio
https://www.npr.org/sections/thetwo-way/2017/12/12/570206648/an-asteroid-gets-its-close-up-as-gemenids-light-up-the-sky
The discovery of Phaethon was announced in IAU Circular 3878.
Goldstone SNRs
Phaethon: D = 5.1 km, P = 3.604 h, OC albedo = 0.1
DSS-14/GBT
w DOY start date window RA, dec dist delta runs SNR/day SNR/run SNR/RTT
49 339 2017 Dec 05 03:08-15:30 97, +41 0.227 -51 99 22 2
49 340 2017 Dec 06 02:55-15:20 95, +42 0.209 -51 108 30 3
49 341 2017 Dec 07 02:41-15:09 93, +42 0.191 -51 118 43 4
49 342 2017 Dec 08 02:24-14:56 90, +43 0.174 -50 131 62 6
49 343 2017 Dec 09 02:05-14:39 87, +44 0.157 -50 146 94 8 18
49 344 2017 Dec 10 01:42-14:19 82, +44 0.141 -49 164 140 12 28
50 345 2017 Dec 11 01:15-13:53 77, +45 0.125 -48 186 230 18 Scheduled 41
50 346 2017 Dec 12 00:42-13:18 69, +45 0.110 -46 211 370 28 Scheduled 64
50 347 2017 Dec 13 00:02-12:33 60, +45 0.097 -42 240 610 43 Scheduled 99
50 347-348 2017 Dec 13-14 23:16-11:33 48, +44 0.085 -38 270 970 65 Scheduled 150
50 348-349 2017 Dec 14-15 22:27-10:21 34, +41 0.076 -31 294 1400 92 Scheduled 210
50 349-350 2017 Dec 15-16 21:40-09:01 19, +35 0.071 -22 303 1800 120 Scheduled 280
50 350-351 2017 Dec 16-17 21:01-07:41 6, +26 0.069 -11 290 1900 120 Scheduled 280
50 351-352 2017 Dec 17-18 20:33-06:30 354, +17 0.072 0 258 1600 100 Scheduled 230
51 352-353 2017 Dec 18-19 20:14-05:29 345, +8 0.079 +10 217 1100 77 Scheduled 180
51 353-354 2017 Dec 19-20 20:02-04:37 338, +1 0.089 +18 178 630 51 120
51 354-355 2017 Dec 20-21 19:53-03:55 332, -5 0.101 +24 145 360 33 Scheduled 76
51 355-356 2017 Dec 21-22 19:47-03:19 328, -9 0.115 +28 119 210 21 48
51 356-357 2017 Dec 22-23 19:42-02:48 324, -13 0.130 +31 99 120 13 30
51 357-358 2017 Dec 23-24 19:39-02:22 321, -15 0.146 +34 84 75 9 21
51 358-359 2017 Dec 24-25 19:35-01:59 319, -17 0.162 +36 71 47 6
52 359-360 2017 Dec 25-26 19:32-01:39 317, -19 0.179 +37 62 31 4
52 360-361 2017 Dec 26-27 19:28-01:21 315, -21 0.196 +39 54 21 3
Goldstone SNRs assume Ptx = 450 kW and Tsys = 17 K. (Recently Ptx = 240 kW)
The 2007 Arecibo observations suggest that the radar albedo could be about 0.12, so the
SNRs may be ~20% stronger than shown here.
The rapid rotation period indicates that short integrations will be necessary to avoid smear.
Six-minute integrations will produce about 10 degrees of smear.
With such a large diameter and rapid rotation period, the finest monostatic resolution at Goldstone
will probably be 75 m/pixel (0.5 usec). That resolution could place about 34 rows on the target.
"delta" is the subradar latitude. Goldstone observations on the strongest dates could span
mid-southern to mid-northern latitudes and enable radar imaging of the entire surface.
The best coverage will probably be in the south.
Sky motion during the tracks scheduled at Goldstone will be about 104 degrees.
Phaethon
Arecibo SNRs
start date window RA, dec dist delta runs SNR/day SNR/run
2017 Dec 15-16 23:34-00:56 21, +36 0.071 -23 36 12000 2200
2017 Dec 16-17 22:02-00:27 7, +27 0.069 -12 67 23000 2900
2017 Dec 17 21:02-23:42 355, +18 0.071 -1 66 20000 2600
2017 Dec 18 20:29-22:49 346, +9 0.078 +9 56 14000 1900
2017 Dec 19 20:23-21:47 338, +2 0.087 +17 29 5500 1100
Assumptions: Ptx = 900 kW, Tsys = 25 K. Recent transmitter power has been closer to 450 kW.
Regardless, Phaethon should be an outstanding imaging target at Arecibo with a range resolution
at least as fine as 15 m/pixel.
Track Assignments
345 0120 0250 0450 0520 DSS-14 GSSR AST PHAETHON
346 0040 0210 0605 0635 DSS-14 GSSR AST PHAETHON
347 0425 0555 1130 1200 DSS-14 GSSR AST PHAETHON
348 0010 0140 1005 1035 DSS-14 GSSR AST PHAETHON/2017 VT14
349 0430 0600 1000 1030 DSS-14 GSSR AST PHAETHON
350 0125 0255 0900 0930 DSS-14 GSSR AST PHAETHON
351 0340 0510 0740 0810 DSS-14 GSSR AST PHAETHON
352 0050 0220 0630 0700 DSS-14 GSSR AST PHAETHON
353 0115 0245 0525 0555 DSS-14 GSSR PHAE/WZ14/WX12
355 0110 0240 1020 1050 DSS-14 GSSR P/WM64/WZ14/WX12
356 0305 0435 1050 1120 DSS-14 GSSR WM64QL33WZ14WX12
357 0435 0605 1045 1115 DSS-14 GSSR QL33/WM64/WZ14 CANCELLED
361 0110 0240 0435 0505 DSS-14 GSSR QL33/07 AG/WZ14
362 0110 0240 0455 0525 DSS-14 GSSR QL33/07 AG/WZ14
363 0000 0130 0510 0540 DSS-14 GSSR QL33/07 AG/WZ14
Goldstone Schedule in more detail:
UT UT PST Round-trip Monostatic Duration Arecibo
DOY Date Target TX Window TX Window time (sec) SNR/RTT hours Rotations Overlap
345 Dec 11 Phaethon 0150 0450 1750-2050 Dec 10 125 18 3.0 0.83 None Marina
346 Dec 12 Phaethon 0110 0605 1710-2205 Dec 11 110 28 4.9 1.36 None Lance
347 Dec 13 Phaethon 0455 1005 2055-0205 Dec 12-13 97 43 4.9 1.36 None Shantanu
348 Dec 14 Phaethon 0040 1005 1640-0205 Dec 13-14 85 65 9.4 2.61 None Marina
348 Dec 14 2017 VT14 0040 0450 1640-2050 Dec 13 21 23 2.75 unknown
349 Dec 15 Phaethon 0500 1000 2100-0200 Dec 14-15 76 92 5.0 1.39 None Lance
Also uplink to RT-32 antenna at Badary. Overlap: 0500-1000. Plan: 0600-0630.
349 Dec 15 2017 WX12 0500 1000 2100-0200 Dec 14-15 47 2
350 Dec 16 Phaethon 0155 0900 1755-0100 Dec 15-16 71 120 7.1 1.97 None Lance/Marina
Also uplink to RT-32 antenna at Badary. Overlap: 0439-0900. Plan: 0500-0530.
350 Dec 16 2017 WX12 0155 0900 1755-0100 Dec 15-16 42 2
351 Dec 17 Phaethon 0410 0740 2010-2340 Dec 16 69 120 3.5 0.97 None Shantanu
Also uplink to RT-32 antenna at Badary. Overlap: 0437-0740. Plan: 0440-0510.
352 Dec 18 Phaethon 0120 0630 1720-2230 Dec 17 72 100 5.2 1.43 None Lance
Also uplink to RT-32 antenna at Badary. Overlap: 0440-0630 Plan: 0440-0510.
353 Dec 19 Phaethon 0145 0525 1745-2125 Dec 18 79 77 3.7 1.02 None Marina
353 Dec 19 2017 WZ14 0145 0525 1745-2125 Dec 18 25 1
353 Dec 19 2017 WX12 0145 0525 1745-2125 Dec 18 29 9
355 Dec 21 Phaethon 0140 0355 1740-1955 Dec 20 101 33 2.2 0.62 None Shantanu
355 Dec 21 2008 WM64 0525 1020 2225-0220 Dec 20-21 40 6 4.9 unknown
355 Dec 21 2017 WZ14 0140 0850 1740-0050 Dec 20-21 22 1
355 Dec 21 2017 WX12 0140 1020 1740-0220 Dec 20-21 26 14
356 Dec 22 2017 QL33 0335 0515 1935-2115 Dec 21 51 2 1.7 unknown Marina
356 Dec 22 2008 WM64 0435 1050 2035-0250 Dec 21-22 39 7 6.2 unknown
356 Dec 22 2017 WZ14 0435 0810 2035-0010 Dec 21-22 21 1
356 Dec 22 2017 WX12 0335 1050 1935-0250 Dec 21-22 27 12
357 Dec 23 2017 QL33 0505 0525 2105-2135 Dec 22 48 2 0.3 unknown CANCELLED
357 Dec 23 2008 WM64 0505 1045 2105-0245 Dec 22-23 40 6 5.7 unknown CANCELLED
357 Dec 23 2017 WZ14 0505 0725 2105-2325 Dec 22 20 2 CANCELLED
361 Dec 27 2007 AG 0140 0435 1740-2035 Dec 26 58 2 2.9 unknown Marina
361 Dec 27 2017 QL33 0140 0435 1740-2035 Dec 26 37 5 2.9 unknown
361 Dec 27 2017 WZ14 0140 0435 1740-2035 Dec 26 20 2
362 Dec 28 2007 AG 0140 0455 1740-2055 Dec 27 59 2 3.2 unknown Lance
362 Dec 28 2017 QL33 0140 0455 1740-2055 Dec 27 36 6 3.2 unknown
362 Dec 28 2017 WZ14 0140 0410 1740-2010 Dec 27 21 1
363 Dec 29 2007 AG 0030 0510 1630-2110 Dec 28 59 2 4.7 unknown Shantanu
363 Dec 29 2017 QL33 0030 0510 1630-2110 Dec 28 34 7 4.7 unknown
363 Dec 29 2017 WZ14 0030 0335 1630-1735 Dec 28 23 1
Transmit times are actual transmit times except for 2017 WZ14 and 2017 VT14, which are in the process of
being approved.
SNRs assume Ptx = 450 kW for Phaethon and 2017 QL33. Estimates fro 2017 VT14, 2017 WX12, and 2017 WZ14 assume 240 kW.
Arecibo Schedule:
UT PST
start date start stop start stop dist SNR/run Duration Rotations Phases
2017 Dec 15-16 23:34-00:56 15:35-16:56 0.071 2200 1.37 0.38 195-331
2017 Dec 16-17 22:02-00:27 14:02-16:27 0.069 2900 2.42 0.67 280-161
2017 Dec 17 21:02-23:42 13:02-15:42 0.071 2600 2.67 0.74 58-324
2017 Dec 18 20:29-22:49 12:29-14:49 0.078 1900 2.33 0.65 241-114
2017 Dec 19 20:23-21:47 12:23-13:47 0.087 1100 1.23 0.34 109-249
These SNRs assume Ptx = 900 kW. Actual transmitter power is currently about 1/2 of that.
If the Arecibo observations go well, they will provide thorough rotational coverage:
000 030 060 090 120 150 180 210 240 270 300 330 360
Dec 15-16 xxxxxxxxxxxxxxxxxxxxxxxxx
Dec 16-17 xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxx
Dec 17 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Dec 18 xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx
Dec 19 xxxxxxxxxxxxxxxxxxxxxxxxx
Phaethon Elevations at Goldstone
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-14 00:40 C 50.51625 44.39676 56.2806 34.1184 0.08757897469317
2017-Dec-14 00:50 C 50.42504 44.38438 56.9857 35.8828 0.08749864347402
2017-Dec-14 01:00 C 50.33364 44.37189 57.6525 37.6614 0.08741844607053
2017-Dec-14 01:10 N 50.24206 44.35930 58.2791 39.4532 0.08733838498941
2017-Dec-14 01:20 N 50.15029 44.34659 58.8635 41.2571 0.08725846270362
2017-Dec-14 01:30 N 50.05835 44.33378 59.4029 43.0722 0.08717868164806
2017-Dec-14 01:40 A 49.96622 44.32085 59.8943 44.8975 0.08709904421500
2017-Dec-14 01:50 A 49.87391 44.30782 60.3336 46.7318 0.08701955274997
2017-Dec-14 02:00 A 49.78143 44.29466 60.7163 48.5741 0.08694020954744
2017-Dec-14 02:10 49.68877 44.28139 61.0364 50.4233 0.08686101684673
2017-Dec-14 02:20 49.59593 44.26799 61.2870 52.2780 0.08678197682808
2017-Dec-14 02:30 49.50293 44.25448 61.4595 54.1371 0.08670309160866
2017-Dec-14 02:40 49.40976 44.24085 61.5430 55.9989 0.08662436323901
2017-Dec-14 02:50 49.31641 44.22709 61.5244 57.8619 0.08654579369922
2017-Dec-14 03:00 49.22291 44.21321 61.3871 59.7241 0.08646738489559
2017-Dec-14 03:10 49.12924 44.19920 61.1100 61.5832 0.08638913865730
2017-Dec-14 03:20 49.03541 44.18506 60.6664 63.4366 0.08631105673317
2017-Dec-14 03:30 48.94143 44.17079 60.0218 65.2809 0.08623314078877
2017-Dec-14 03:40 48.84729 44.15640 59.1312 67.1118 0.08615539240344
2017-Dec-14 03:50 48.75300 44.14187 57.9353 68.9238 0.08607781306779
2017-Dec-14 04:00 48.65856 44.12721 56.3549 70.7095 0.08600040418114
2017-Dec-14 04:10 48.56398 44.11242 54.2832 72.4589 0.08592316704920
2017-Dec-14 04:20 48.46925 44.09749 51.5754 74.1578 0.08584610288205
2017-Dec-14 04:30 48.37439 44.08243 48.0356 75.7864 0.08576921279218
2017-Dec-14 04:40 48.27939 44.06723 43.4038 77.3153 0.08569249779283
2017-Dec-14 04:50 48.18425 44.05189 37.3559 78.7024 0.08561595879642
2017-Dec-14 05:00 48.08899 44.03642 29.5472 79.8873 0.08553959661330
2017-Dec-14 05:10 47.99360 44.02081 19.7601 80.7900 0.08546341195075
2017-Dec-14 05:20 47.89809 44.00506 8.1928 81.3208 0.08538740541190
2017-Dec-14 05:30 t 47.80245 43.98917 355.7129 81.4096 0.08531157749529
2017-Dec-14 05:40 47.70671 43.97314 343.6488 81.0428 0.08523592859429
2017-Dec-14 05:50 47.61084 43.95697 333.1088 80.2717 0.08516045899696
2017-Dec-14 06:00 47.51487 43.94066 324.5379 79.1827 0.08508516888595
2017-Dec-14 06:10 47.41879 43.92421 317.8409 77.8615 0.08501005833879
2017-Dec-14 06:20 47.32261 43.90761 312.6969 76.3762 0.08493512732834
2017-Dec-14 06:30 47.22633 43.89088 308.7646 74.7755 0.08486037572331
2017-Dec-14 06:40 47.12995 43.87401 305.7576 73.0933 0.08478580328925
2017-Dec-14 06:50 47.03348 43.85699 303.4562 71.3525 0.08471140968954
2017-Dec-14 07:00 46.93692 43.83984 301.6973 69.5693 0.08463719448676
2017-Dec-14 07:10 46.84028 43.82254 300.3606 67.7552 0.08456315714409
2017-Dec-14 07:20 46.74355 43.80511 299.3573 65.9183 0.08448929702710
2017-Dec-14 07:30 46.64674 43.78753 298.6210 64.0649 0.08441561340562
2017-Dec-14 07:40 46.54985 43.76982 298.1019 62.1996 0.08434210545581
2017-Dec-14 07:50 46.45289 43.75196 297.7615 60.3262 0.08426877226256
2017-Dec-14 08:00 46.35586 43.73397 297.5705 58.4475 0.08419561282187
2017-Dec-14 08:10 46.25876 43.71584 297.5058 56.5660 0.08412262604363
2017-Dec-14 08:20 46.16159 43.69757 297.5493 54.6838 0.08404981075444
2017-Dec-14 08:30 46.06436 43.67917 297.6864 52.8025 0.08397716570060
2017-Dec-14 08:40 45.96707 43.66063 297.9057 50.9237 0.08390468955141
2017-Dec-14 08:50 45.86972 43.64195 298.1976 49.0488 0.08383238090245
2017-Dec-14 09:00 45.77232 43.62314 298.5547 47.1790 0.08376023827918
2017-Dec-14 09:10 45.67486 43.60420 298.9708 45.3155 0.08368826014050
2017-Dec-14 09:20 45.57735 43.58512 299.4406 43.4594 0.08361644488270
2017-Dec-14 09:30 45.47979 43.56591 299.9601 41.6119 0.08354479084334
2017-Dec-14 09:40 45.38219 43.54657 300.5259 39.7738 0.08347329630525
2017-Dec-14 09:50 45.28454 43.52710 301.1352 37.9462 0.08340195950086
2017-Dec-14 10:00 45.18685 43.50751 301.7856 36.1302 0.08333077861636
2017-Dec-14 10:10 45.08911 43.48778 302.4753 34.3268 0.08325975179621
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-15 05:00 33.56096 40.52980 309.5792 81.5241 0.07605878179522
2017-Dec-15 05:10 33.45340 40.49553 303.2088 79.8225 0.07600478074060
2017-Dec-15 05:20 33.34581 40.46108 298.9437 78.0092 0.07595101231017
2017-Dec-15 05:30 33.23820 40.42645 296.0283 76.1286 0.07589747641609
2017-Dec-15 05:40 33.13057 40.39164 294.0090 74.2056 0.07584417285819
2017-Dec-15 05:50 33.02292 40.35665 292.6075 72.2549 0.07579110132514
2017-Dec-15 06:00 32.91525 40.32148 291.6475 70.2857 0.07573826139568
2017-Dec-15 06:10 32.80758 40.28613 291.0130 68.3042 0.07568565254004
2017-Dec-15 06:20 32.69991 40.25060 290.6255 66.3146 0.07563327412181
2017-Dec-15 06:30 32.59223 40.21490 290.4299 64.3200 0.07558112539983
2017-Dec-15 06:40 32.48455 40.17902 290.3870 62.3228 0.07552920553040
2017-Dec-15 06:50 32.37688 40.14296 290.4679 60.3248 0.07547751356963
2017-Dec-15 07:00 32.26922 40.10673 290.6511 58.3276 0.07542604847607
2017-Dec-15 07:10 32.16157 40.07032 290.9205 56.3324 0.07537480911354
2017-Dec-15 07:20 32.05394 40.03374 291.2634 54.3404 0.07532379425410
2017-Dec-15 07:30 31.94632 39.99699 291.6702 52.3526 0.07527300258126
2017-Dec-15 07:40 31.83873 39.96006 292.1333 50.3698 0.07522243269344
2017-Dec-15 07:50 31.73116 39.92297 292.6466 48.3931 0.07517208310738
2017-Dec-15 08:00 31.62362 39.88571 293.2055 46.4233 0.07512195226207
2017-Dec-15 08:10 31.51610 39.84828 293.8062 44.4611 0.07507203852250
2017-Dec-15 08:20 31.40863 39.81068 294.4456 42.5075 0.07502234018385
2017-Dec-15 08:30 31.30118 39.77292 295.1215 40.5632 0.07497285547561
2017-Dec-15 08:40 31.19377 39.73499 295.8319 38.6290 0.07492358256596
2017-Dec-15 08:50 31.08641 39.69690 296.5754 36.7058 0.07487451956630
2017-Dec-15 09:00 30.97908 39.65866 297.3510 34.7945 0.07482566453578
2017-Dec-15 09:10 30.87180 39.62025 298.1579 32.8959 0.07477701548609
2017-Dec-15 09:20 30.76456 39.58168 298.9955 31.0110 0.07472857038619
2017-Dec-15 09:30 30.65737 39.54296 299.8635 29.1406 0.07468032716736
2017-Dec-15 09:40 30.55023 39.50409 300.7618 27.2858 0.07463228372807
2017-Dec-15 09:50 30.44314 39.46506 301.6904 25.4475 0.07458443793911
2017-Dec-15 10:00 30.33610 39.42588 302.6495 23.6269 0.07453678764871
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-16 02:00 A 20.13514 35.06943 84.6817 71.9730 0.07075115860504
2017-Dec-16 02:10 20.02824 35.01728 85.7947 74.0888 0.07072171482524
2017-Dec-16 02:20 19.92137 34.96495 87.0084 76.2080 0.07069254638436
2017-Dec-16 02:30 19.81454 34.91246 88.3810 78.3299 0.07066365448982
2017-Dec-16 02:40 19.70773 34.85980 90.0219 80.4533 0.07063504023151
2017-Dec-16 02:50 19.60097 34.80697 92.1648 82.5761 0.07060670457995
2017-Dec-16 03:00 19.49425 34.75399 95.4151 84.6937 0.07057864838462
2017-Dec-16 03:10 19.38757 34.70083 101.9521 86.7902 0.07055087237257
2017-Dec-16 03:20 19.28095 34.64751 127.8790 88.7421 0.07052337714723
2017-Dec-16 03:30 t 19.17438 34.59402 234.5712 88.5791 0.07049616318754
2017-Dec-16 03:40 19.06786 34.54037 256.1097 86.5898 0.07046923084740
2017-Dec-16 03:50 18.96141 34.48656 262.1095 84.4841 0.07044258035513
2017-Dec-16 04:00 18.85503 34.43258 265.2021 82.3574 0.07041621181346
2017-Dec-16 04:10 18.74872 34.37844 267.2764 80.2234 0.07039012519964
2017-Dec-16 04:20 18.64248 34.32414 268.8794 78.0864 0.07036432036582
2017-Dec-16 04:30 18.53632 34.26968 270.2271 75.9483 0.07033879703971
2017-Dec-16 04:40 18.43024 34.21506 271.4220 73.8101 0.07031355482551
2017-Dec-16 04:50 18.32424 34.16028 272.5192 71.6727 0.07028859320505
2017-Dec-16 05:00 18.21834 34.10534 273.5510 69.5366 0.07026391153924
2017-Dec-16 05:10 18.11253 34.05025 274.5376 67.4024 0.07023950906969
2017-Dec-16 05:20 18.00681 33.99500 275.4926 65.2705 0.07021538492070
2017-Dec-16 05:30 17.90119 33.93959 276.4253 63.1415 0.07019153810136
2017-Dec-16 05:40 17.79568 33.88403 277.3426 61.0158 0.07016796750798
2017-Dec-16 05:50 17.69027 33.82832 278.2495 58.8938 0.07014467192672
2017-Dec-16 06:00 17.58497 33.77246 279.1501 56.7760 0.07012165003648
2017-Dec-16 06:10 17.47978 33.71646 280.0475 54.6629 0.07009890041193
2017-Dec-16 06:20 17.37471 33.66030 280.9444 52.5551 0.07007642152688
2017-Dec-16 06:30 17.26976 33.60400 281.8430 50.4529 0.07005421175772
2017-Dec-16 06:40 17.16493 33.54755 282.7453 48.3569 0.07003226938726
2017-Dec-16 06:50 17.06022 33.49097 283.6530 46.2677 0.07001059260850
2017-Dec-16 07:00 16.95564 33.43424 284.5676 44.1858 0.06998917952881
2017-Dec-16 07:10 16.85119 33.37737 285.4907 42.1118 0.06996802817426
2017-Dec-16 07:20 16.74687 33.32037 286.4235 40.0462 0.06994713649392
2017-Dec-16 07:30 16.64269 33.26323 287.3674 37.9899 0.06992650236463
2017-Dec-16 07:40 16.53863 33.20596 288.3238 35.9433 0.06990612359565
2017-Dec-16 07:50 16.43472 33.14855 289.2938 33.9072 0.06988599793365
2017-Dec-16 08:00 16.33094 33.09102 290.2786 31.8823 0.06986612306766
2017-Dec-16 08:10 16.22731 33.03336 291.2796 29.8695 0.06984649663428
2017-Dec-16 08:20 16.12381 32.97557 292.2980 27.8695 0.06982711622296
2017-Dec-16 08:30 16.02046 32.91766 293.3350 25.8831 0.06980797938130
2017-Dec-16 08:40 15.91726 32.85963 294.3919 23.9113 0.06978908362056
2017-Dec-16 08:50 15.81420 32.80148 295.4701 21.9551 0.06977042642116
2017-Dec-16 09:00 15.71128 32.74321 296.5707 20.0154 0.06975200523829
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-17 04:10 4.53898 25.50873 254.3532 64.7668 0.06901364118912
2017-Dec-17 04:20 4.44679 25.44148 256.7959 62.6830 0.06902179832332
2017-Dec-17 04:30 4.35475 25.37417 258.9999 60.5806 0.06903024769061
2017-Dec-17 04:40 4.26288 25.30681 261.0129 58.4641 0.06903898777903
2017-Dec-17 04:50 4.17116 25.23938 262.8718 56.3371 0.06904801695844
2017-Dec-17 05:00 4.07961 25.17190 264.6053 54.2024 0.06905733348360
2017-Dec-17 05:10 3.98822 25.10436 266.2359 52.0622 0.06906693549759
2017-Dec-17 05:20 3.89700 25.03677 267.7820 49.9184 0.06907682103530
2017-Dec-17 05:30 3.80596 24.96912 269.2582 47.7725 0.06908698802729
2017-Dec-17 05:40 3.71509 24.90143 270.6767 45.6261 0.06909743430378
2017-Dec-17 05:50 3.62439 24.83369 272.0476 43.4803 0.06910815759888
2017-Dec-17 06:00 3.53387 24.76590 273.3795 41.3362 0.06911915555498
2017-Dec-17 06:10 3.44352 24.69806 274.6795 39.1948 0.06913042572737
2017-Dec-17 06:20 3.35336 24.63018 275.9541 37.0572 0.06914196558903
2017-Dec-17 06:30 3.26338 24.56226 277.2086 34.9242 0.06915377253557
2017-Dec-17 06:40 3.17359 24.49430 278.4479 32.7967 0.06916584389032
2017-Dec-17 06:50 3.08398 24.42630 279.6763 30.6756 0.06917817690962
2017-Dec-17 07:00 2.99455 24.35826 280.8977 28.5618 0.06919076878818
2017-Dec-17 07:10 2.90531 24.29019 282.1156 26.4561 0.06920361666462
2017-Dec-17 07:20 2.81626 24.22209 283.3335 24.3594 0.06921671762710
2017-Dec-17 07:30 2.72740 24.15396 284.5542 22.2726 0.06923006871903
2017-Dec-17 07:40 2.63873 24.08580 285.7808 20.1968 0.06924366694492
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-18 01:20 N 354.02415 16.90712 167.9062 71.1313 0.07179170567988
2017-Dec-18 01:30 N 353.94816 16.84038 175.5680 71.3679 0.07182759824190
2017-Dec-18 01:40 At 353.87231 16.77366 183.3040 71.3218 0.07186376642386
2017-Dec-18 01:50 A 353.79658 16.70697 190.9026 70.9948 0.07190020997783
2017-Dec-18 02:00 A 353.72099 16.64030 198.1754 70.4005 0.07193692851661
2017-Dec-18 02:10 353.64554 16.57366 204.9845 69.5623 0.07197392151381
2017-Dec-18 02:20 353.57022 16.50705 211.2521 68.5087 0.07201118830432
2017-Dec-18 02:30 353.49504 16.44046 216.9541 67.2695 0.07204872808489
2017-Dec-18 02:40 353.42001 16.37391 222.1061 65.8737 0.07208653991514
2017-Dec-18 02:50 353.34513 16.30738 226.7476 64.3469 0.07212462271876
2017-Dec-18 03:00 353.27039 16.24088 230.9299 62.7115 0.07216297528501
2017-Dec-18 03:10 353.19580 16.17441 234.7073 60.9863 0.07220159627057
2017-Dec-18 03:20 353.12137 16.10798 238.1319 59.1866 0.07224048420149
2017-Dec-18 03:30 353.04709 16.04158 241.2517 57.3254 0.07227963747557
2017-Dec-18 03:40 352.97297 15.97521 244.1089 55.4130 0.07231905436496
2017-Dec-18 03:50 352.89901 15.90887 246.7405 53.4582 0.07235873301892
2017-Dec-18 04:00 352.82521 15.84258 249.1783 51.4679 0.07239867146700
2017-Dec-18 04:10 352.75157 15.77632 251.4493 49.4480 0.07243886762228
2017-Dec-18 04:20 352.67810 15.71010 253.5769 47.4035 0.07247931928500
2017-Dec-18 04:30 352.60479 15.64391 255.5809 45.3384 0.07252002414635
2017-Dec-18 04:40 352.53166 15.57777 257.4784 43.2564 0.07256097979243
2017-Dec-18 04:50 352.45869 15.51167 259.2841 41.1603 0.07260218370857
2017-Dec-18 05:00 352.38590 15.44561 261.0106 39.0527 0.07264363328369
2017-Dec-18 05:10 352.31327 15.37960 262.6689 36.9360 0.07268532581496
2017-Dec-18 05:20 352.24083 15.31363 264.2687 34.8120 0.07272725851264
2017-Dec-18 05:30 352.16856 15.24770 265.8185 32.6827 0.07276942850504
2017-Dec-18 05:40 352.09646 15.18183 267.3257 30.5496 0.07281183284369
2017-Dec-18 05:50 352.02454 15.11600 268.7970 28.4141 0.07285446850865
2017-Dec-18 06:00 351.95280 15.05022 270.2385 26.2778 0.07289733241397
2017-Dec-18 06:10 351.88124 14.98449 271.6556 24.1418 0.07294042141331
2017-Dec-18 06:20 351.80986 14.91881 273.0533 22.0073 0.07298373230558
2017-Dec-18 06:30 351.73867 14.85318 274.4362 19.8756 0.07302726184082
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-19 01:40 A 344.40543 7.78542 203.6960 60.4014 0.07906869501602
2017-Dec-19 01:50 A 344.34692 7.72828 208.3848 59.4300 0.07913163253292
2017-Dec-19 02:00 A 344.28853 7.67123 212.8058 58.3138 0.07919479226586
2017-Dec-19 02:10 344.23026 7.61425 216.9546 57.0678 0.07925817303964
2017-Dec-19 02:20 344.17211 7.55735 220.8361 55.7063 0.07932177354599
2017-Dec-19 02:30 344.11409 7.50053 224.4615 54.2428 0.07938559234559
2017-Dec-19 02:40 344.05620 7.44378 227.8462 52.6896 0.07944962787008
2017-Dec-19 02:50 343.99844 7.38711 231.0077 51.0578 0.07951387842467
2017-Dec-19 03:00 343.94081 7.33052 233.9647 49.3571 0.07957834219065
2017-Dec-19 03:10 343.88331 7.27402 236.7355 47.5963 0.07964301722846
2017-Dec-19 03:20 343.82595 7.21759 239.3382 45.7831 0.07970790148084
2017-Dec-19 03:30 343.76873 7.16124 241.7894 43.9240 0.07977299277619
2017-Dec-19 03:40 343.71164 7.10497 244.1049 42.0249 0.07983828883229
2017-Dec-19 03:50 343.65469 7.04878 246.2990 40.0909 0.07990378726019
2017-Dec-19 04:00 343.59789 6.99267 248.3846 38.1265 0.07996948556818
2017-Dec-19 04:10 343.54122 6.93664 250.3738 36.1355 0.08003538116623
2017-Dec-19 04:20 343.48470 6.88070 252.2772 34.1215 0.08010147137038
2017-Dec-19 04:30 343.42833 6.82484 254.1046 32.0875 0.08016775340745
2017-Dec-19 04:40 343.37209 6.76906 255.8648 30.0363 0.08023422441992
2017-Dec-19 04:50 343.31601 6.71336 257.5658 27.9703 0.08030088147093
2017-Dec-19 05:00 343.26007 6.65775 259.2148 25.8916 0.08036772154947
2017-Dec-19 05:10 343.20428 6.60222 260.8186 23.8024 0.08043474157576
2017-Dec-19 05:20 343.14864 6.54677 262.3833 21.7043 0.08050193840661
2017-Dec-19 05:30 343.09315 6.49141 263.9144 19.5992 0.08056930884118
Date__(UT)__HR:MN R.A._(a-appar)_DEC. Azi_(a-appr)_Elev delta
2017-Dec-21 01:40 Am 331.53775 -5.25927 216.8024 42.3536 0.10219266903192
2017-Dec-21 01:50 Am 331.50281 -5.29365 219.7017 41.0415 0.10228745130649
2017-Dec-21 02:00 Am 331.46795 -5.32795 222.4771 39.6512 0.10238236511394
2017-Dec-21 02:10 m 331.43317 -5.36219 225.1327 38.1892 0.10247740872332
2017-Dec-21 02:20 m 331.39846 -5.39635 227.6735 36.6617 0.10257258029047
2017-Dec-21 02:30 m 331.36385 -5.43045 230.1055 35.0745 0.10266787786134
2017-Dec-21 02:40 m 331.32931 -5.46449 232.4349 33.4327 0.10276329937538
2017-Dec-21 02:50 m 331.29486 -5.49845 234.6680 31.7413 0.10285884266935
2017-Dec-21 03:00 m 331.26049 -5.53235 236.8115 30.0049 0.10295450548122
2017-Dec-21 03:10 331.22620 -5.56618 238.8717 28.2275 0.10305028545423
2017-Dec-21 03:20 331.19201 -5.59995 240.8549 26.4129 0.10314618014121
2017-Dec-21 03:30 331.15790 -5.63364 242.7673 24.5646 0.10324218700912
2017-Dec-21 03:40 331.12388 -5.66728 244.6147 22.6857 0.10333830344357
2017-Dec-21 03:50 331.08995 -5.70084 246.4029 20.7793 0.10343452675367
2017-Dec-21 04:00 331.05611 -5.73434 248.1371 18.8478 0.10353085417708
Uncertainties
Phaethon
JPL/Horizons solution 595, # obs: 4010 (1983-2017)
2017 Nov 28
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2017-Dec-05 00:00 * 97.67967 40.71224 0.23379614262561 0.271 0.25 0.90 0.000349
2017-Dec-06 00:00 * 95.93539 41.28119 0.21570719302836 0.290 0.27 0.99 0.000357
2017-Dec-07 00:00 * 93.81755 41.90869 0.19785242297660 0.310 0.30 1.10 0.000366
2017-Dec-08 00:00 * 91.21342 42.59579 0.18027903066639 0.333 0.34 1.22 0.000375
2017-Dec-09 00:00 * 87.96463 43.33553 0.16305391932116 0.358 0.37 1.35 0.000386
2017-Dec-10 00:00 * 83.84649 44.10300 0.14627410348245 0.385 0.41 1.50 0.000397
2017-Dec-11 00:00 * 78.54131 44.83447 0.13008368500230 0.415 0.45 1.65 0.000409 First track
2017-Dec-12 00:00 * 71.61553 45.38488 0.11470168994691 0.449 0.49 1.77 0.000421
2017-Dec-13 00:00 * 62.54189 45.44867 0.10046667409435 0.494 0.52 1.88 0.000431
2017-Dec-14 00:00 * 50.87924 44.44520 0.08790175432491 0.567 0.60 2.17 0.000436
2017-Dec-15 00:00 * 36.75588 41.47588 0.07778308012588 0.704 0.93 3.37 0.000427
2017-Dec-16 00:00 * 21.41883 35.68248 0.07112553148231 0.923 1.61 5.86 0.000395
2017-Dec-17 00:00 * 6.88573 27.16641 0.06890661371561 1.160 2.37 8.61 0.000335
2017-Dec-18 00:00 *m 354.63648 17.44185 0.07151457912642 1.297 2.72 9.88 0.000257
2017-Dec-19 00:00 *m 344.99687 8.36092 0.07845177535222 1.289 2.55 9.26 0.000183
2017-Dec-20 00:00 *m 337.59260 0.88741 0.08869848702067 1.188 2.13 7.76 0.000137
2017-Dec-21 00:00 *m 331.89123 -4.91173 0.10125238898630 1.058 1.71 6.22 0.000128
2017-Dec-22 00:00 *m 327.43530 -9.34118 0.11536657970455 0.932 1.37 4.98 0.000144
2017-Dec-23 00:00 *m 323.88475 -12.74457 0.13054545240881 0.822 1.11 4.05 0.000168
1-sigma time delay corrections during the first track could be in the realm of 140 usec or less.
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:
Phaethon
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/Illu%
2017-Nov-15 00:00 106.82890 35.59875 0.62238160127078 15.76 5.67 127.6592 /L 88.2/ 11.7
2017-Nov-16 00:00 106.81230 35.71842 0.60208925016069 15.66 5.65 128.6303 /L 100.3/ 6.1
2017-Nov-17 00:00 106.77488 35.84533 0.58186899194359 15.56 5.63 129.6151 /L 112.2/ 2.3
2017-Nov-18 00:00 106.71481 35.98010 0.56172339282206 15.46 5.60 130.6146 /L 123.9/ 0.4
2017-Nov-19 00:00 106.63004 36.12340 0.54165503148471 15.36 5.58 131.6297 /L 135.2/ 0.4
2017-Nov-20 00:00 106.51819 36.27601 0.52166650805842 15.25 5.55 132.6616 /L 145.9/ 2.3
2017-Nov-21 00:00 106.37658 36.43881 0.50176045994726 15.14 5.53 133.7114 /L 155.5/ 5.8
2017-Nov-22 00:00 106.20208 36.61277 0.48193958562367 15.02 5.50 134.7807 /L 162.1/ 10.9
2017-Nov-23 00:00 105.99105 36.79902 0.46220667753937 14.90 5.47 135.8708 /L 162.2/ 17.4
2017-Nov-24 00:00 105.73924 36.99882 0.44256466565477 14.78 5.44 136.9836 /L 155.6/ 25.1
2017-Nov-25 00:00 105.44166 37.21365 0.42301667381543 14.64 5.41 138.1209 /L 145.8/ 33.7
2017-Nov-26 00:00 105.09234 37.44516 0.40356609247749 14.51 5.38 139.2848 /L 134.8/ 43.1
2017-Nov-27 00:00 104.68416 37.69529 0.38421667328780 14.37 5.35 140.4778 /L 123.0/ 53.0
2017-Nov-28 00:00 104.20851 37.96627 0.36497265402907 14.22 5.31 141.7024 /L 110.6/ 63.1
2017-Dec-01 00:00 102.25859 38.93214 0.30792666435279 13.73 5.20 145.5945 /L 70.3/ 89.9
2017-Dec-02 00:00 101.37931 39.31666 0.28916375481535 13.54 5.16 146.9742 /L 56.1/ 95.8
2017-Dec-03 00:00 100.34633 39.73955 0.27054347855010 13.35 5.11 148.3986 /L 42.1/ 99.2
2017-Dec-04 00:00 99.12566 40.20590 0.25207997226961 13.15 5.07 149.8674 /L 29.4/ 99.7
2017-Dec-05 00:00 97.67258 40.72114 0.23379185511882 12.93 5.02 151.3760 /L 21.4/ 97.2
2017-Dec-06 00:00 95.92720 41.29066 0.21570408052865 12.70 4.97 152.9113 /L 23.9/ 91.8
2017-Dec-07 00:00 93.80799 41.91877 0.19785067048305 12.46 4.91 154.4440 /L 34.8/ 84.2
2017-Dec-08 00:00 91.20216 42.60650 0.18027887070454 12.20 4.86 155.9131 /L 48.6/ 74.8
2017-Dec-09 00:00 87.95124 43.34689 0.16305564820074 11.93 4.81 157.1980 /L 63.4/ 64.4
2017-Dec-10 00:00 83.83040 44.11496 0.14627810330121 11.65 4.76 158.0720 /L 78.7/ 53.6
2017-Dec-11 00:00 78.52184 44.84685 0.13009045182031 11.37 4.74 158.1407 /L 94.3/ 43.0
2017-Dec-12 00:00 71.59196 45.39729 0.11471186436599 11.11 4.75 156.8123 /T 110.3/ 33.0
2017-Dec-13 00:00 62.51385 45.46041 0.10048105643844 10.90 4.81 153.3778 /T 126.4/ 24.0
2017-Dec-14 00:00 50.84759 44.45527 0.08792124855905 10.75 4.93 147.1866 /T 141.4/ 16.1
2017-Dec-15 00:00 36.72376 41.48362 0.07780843866949 10.71 5.10 137.8056 /T 149.5/ 9.7
2017-Dec-16 00:00 21.39108 35.68887 0.07115676037297 10.82 5.31 125.2774 /T 141.2/ 4.8
2017-Dec-17 00:00 6.86570 27.17421 0.06894230389803 11.14 5.54 110.5925 /T 120.9/ 1.6
2017-Dec-18 00:00 354.62423 17.45308 0.07155214389640 11.66 5.78 95.7037 /T 97.2/ 0.2
2017-Dec-19 00:00 344.99058 8.37513 0.07848876811153 12.33 6.02 82.4529 /T 74.0/ 0.6
2017-Dec-20 00:00 337.59032 0.90297 0.08873350399338 13.05 6.24 71.6022 /T 52.8/ 2.7
2017-Dec-21 00:00 331.89152 -4.89616 0.10128495455374 13.76 6.46 63.0063 /T 33.6/ 6.5
2017-Dec-22 00:00 327.43721 -9.32632 0.11539670821482 14.42 6.65 56.1939 /T 16.1/ 11.9
2017-Dec-23 00:00 323.88768 -12.73072 0.13057334240222 15. 7. 50.7028 /T 2.219/ 18.8
2017-Dec-24 00:00 321.00173 -15.38617 0.14649893474842 16. 7. 46.1737 /T 16.3/ 26.9
2017-Dec-25 00:00 318.60953 -17.49422 0.16297358083064 16. 7. 42.3479 /T 31.4/ 36.1
Setups
Due to its diameter, rotation period, the known pole direction, and subradar latitude of -48 deg,
the bandwidth when observations start on Dec. 11 should be about 95 Hz.
The bandwidth will reach a maximum of about 140 Hz when the subradar latitude is near the equator
on Dec 18 and then reduce to about 130 Hz by the final track on Dec. 21.
CW setup:
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TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: no hopping
Bandwidth: 5000 Hz
TXoffset +500 Hz
FFT for PFS files: 500 for 10.0 Hz resolution
Ranging setups:
---------------------------------------------------------------------------
10-usec
baud 10 usec
code 127
PRP 1270 usec
FFT 64
ncoh 1
bandwidth 787 Hz
resolution 12.3 Hz
TXOFF +100 Hz (echo in column 32 + 8 = 40)
---------------------------------------------------------------------------
11-usec
baud 11 usec
code 127
PRP 1397 usec
FFT 64
ncoh 1
bandwidth 716 Hz
resolution 11.2 Hz
TXOFF +100 Hz (echo in column 32 + 9 = 41)
-------------------------------------------------------------------------
1-usec
baud 1 usec
code 255
ncoh 2
bandwidth 1960.8 Hz
FFT 512
resolution 3.8 Hz
TXOFF +200 Hz
The 1 usec setup provides sufficient resolution to spatially resolve the asteroid
into about 17 rows.
---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in
aardvark:/export/data0/phaethon/raw/
POINTING:
OSOD and predicts will be on aardvark:
...not available yet...
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
... not available yet...
Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.??
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
GOLDSTONE MASTERLOG
==============================================================================
Receive TX
Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes
------------------------------------------------------------------------------
Dr. Lance A. M. Benner | PHONE: (818) 354-7412
Mail Stop 183-601 | FAX: (818) 393-4445
Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov
California Institute of Technology | Plan: To live long and prosper
Pasadena, CA 91109-8099
https://echo.jpl.nasa.gov/asteroids/Phaethon/Phaethon_planning.2017.html
Asteroid Radar Astronomy
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